查询词典 particles

He outlines how the Higgs field, which is thought to be responsible for endowing matter with mass and thus enabling gravity to act on it, may also be a collective property. Physicists are engaged in the biggest scientific experiment in the history of the world at CERN, the European particle physics laboratory, in an attempt to find the particles associated with this field and thereby confirm its existence.

他认为希格斯场（人们认为希格斯场赋予了物质以质量，从而万有引力可以作用于物质之间）可能也有其它物质相伴，并对验证过程进行了简要描述；物理学家正在CERN的欧洲粒子物理试验室里进行史上最大规模的实验，为的是找到和希格斯场关联的粒子，从而确定希格斯场的存在。

The missing link, he adds,"is whether the sodium in the E-ring particles really came from Enceladus."

而最后，这些固态的钠元素将重新和土卫二的喷发物融合在一起并继续存在于土星E环中。

Enceladus continues to exhale water ice into Saturn orbit, keeping the E ring topped off with tiny particles.

土卫二继续喷发冰粒到土星轨道中，使处于外围的E环充满了微小的微粒。

Results: The positive particles of IL-1β was in the cytosol of myocardial cell and vascular endotheliocyte near to the endocardium.

结果：IL-1β阳性颗粒主要在心内膜下的心肌细胞和血管内皮细胞的胞浆中表达。

This method provides an alterative way to obtain energy spectra of precipitating particles, and may also act as the complement of the lowertimeresolution limitations of satellite energetic particle observations. It is of high value in both academic and applied fields to establish models of space environment disturbance.

该方法开辟了获取沉降粒子能谱特征的一条新途径，可以弥补卫星能量粒子观测数据磁地方时分辨率的不足，对于建立空间环境扰动模式具有重要的学术意义和应用价值。

Energetic Particle and Plasma Spectrometer: Measurements of the acceleration of charged particles at the Venus bow shock, where the solar wind slams in to the atmosphere

高能粒子及离子光谱仪：测量金星弓形激波，也就是太阳风轰击大气的地方，处带电粒子的加速度

The influences of the shock thickness and Alfven waves on the particle acceleration by diffusive shock waves are numerically studied through solving one-dimensional diffusive equation including the second-order Fermi effect. It is shown that the spectral index of the energetic particles strongly depends on the shock thickness. For example, the spectral index increases from 2.1 to 3.7 in the low energy range of 3-10 MeV and from 2.5 to 5.0 in the high energy range of 20-60 MeV as the thickness increases. The spectral index decreases from 4.3 to 3.1 as the particle injection energy increases. The spectral index decreases from 4.0 to 1.8 at the quasi-steady stage with the enhancement of the compression ratio from 2 to 4. The results indicate that under the influence of Alfven waves, the energetic particle spectrum at lower energy becomes flat and the spectral index decreases from 2.5 to 0.6 in the low energy range of 3-10 MeV and from 11.6 to 5.0 in the high energy range of 20-60 MeV. At the same time, the rollover energy reaches 19.6 MeV. The spectral index decreases from 5.8 to 2.9 as the energy density of Alfven waves increase. All these results are basically consistent with the theoretical models, as well as the observations of typical energetic particle events.

通过数值求解包含二阶费米加速的一维扩散方程，探讨在准平行激波条件下激波厚度和级联阿尔芬波对粒子加速的影响，研究粒子分布函数的演化与激波厚度和阿尔芬波强度的内禀关系，计算结果表明：(1)考虑激波厚度时，谱指数明显依赖于激波厚度，随着厚度从0.32增大到2.56，低能端(3-10MeV)谱指数逐渐从2.1增加到3.7，高能端(20-60MeV)谱指数从2.4增大到5.0，能谱逐渐变软；当初始注入粒子动量增大1.3倍，质子能谱指数从4.3减小到3.1，且与零厚度激波加速的谱指数差值缩小；厚度不变时，随着压缩比从2增加到4，准稳态分布时低能端(3-10MeV)粒子能谱指数逐渐从4.0减小到1.8谱变硬；(2)在级联阿尔芬波的影响下，随着时间的增大，粒子在低能处(3-10MeV)的谱指数从2.5减小到0.6高能端(20-60MeV)谱指数从11.6减小到5.0，能谱变硬，拐点能量值从7.5MeV增大到为19.6MeV；随着波的能量密度增大，谱指数从5.8减小到2.9，这表明阿尔芬波强度越大，加速效率越高，通过与激波厚度解析结果和高能粒子事件的观测能谱比较发现两者是一致的，说明数值模拟结果是可靠的。

Energy is injected into space by quasars in the form of fast, nonrelativistic particles.

能量是以快速非相对论性粒子的形式由类星体注入空间的。

The rate of flow of fluid , particles, or energy through a given surface.

空气，无论是气态的还是液态的，都是一种流体。

The rate of flow of fluid, particles, or energy through a given surface .

近代飞机和飞弹表面的气流可能是流线的。

Researches reveal that students who suffer from corporal punishment tend to resort to violence in their future life.

研究表明遭受过肉体惩罚的孩子倾向于在他们今后的人生中使用暴力。

Total sugar of sarcocarp and chlorophyll of pericarp increased firstly, and then decreased afterward along with altitude; Titratable acidity, ascorbicacid and anthocyanin of pericarp were increased along with altitude; The content of protein increased firstly and decreased afterward along with altitude; Carotenoid of pericarp were decreased along with altitude.

果肉总糖和果皮叶绿素含量随海拔高度升高先升高后降低；可滴定酸、维生素C和果皮花青苷含量均随海拔升高而升高；蛋白质在1720m处最大，1420m处最小；果皮类胡萝卜素随海拔升高而降低。